CN109794297A - Nano metal is catalyzed keto ester high pressure reaction system in a kind of ionic liquid - Google Patents
Nano metal is catalyzed keto ester high pressure reaction system in a kind of ionic liquid Download PDFInfo
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- CN109794297A CN109794297A CN201910158023.8A CN201910158023A CN109794297A CN 109794297 A CN109794297 A CN 109794297A CN 201910158023 A CN201910158023 A CN 201910158023A CN 109794297 A CN109794297 A CN 109794297A
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- ionic liquid
- keto ester
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
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Abstract
The invention discloses nano metals in a kind of ionic liquid to be catalyzed keto ester high pressure reaction system, including synthesizing the metal nanoparticle stable by cinchona alkaloid in ionic liquid, gained metal nanoparticle is catalyzed keto ester chemo-selective under the synergistic effect of chiral modifier and solvent etc. and chiral selectivity adds hydrogen, and efficiently separating for catalyst and product can be realized by simple extraction or centrifugation.It can be recycled repeatedly after the catalyst separation of recycling is dry, activity and chiral selectivity can preferably be kept.Route of the present invention is simple, and synthetic method is novel, simple process, and product yield and purity is high, catalyst is cheap and easy to get, does not influence environment, is suitable for industrialized production.
Description
Technical field
The present invention relates to nano metals in a kind of ionic liquid to be catalyzed keto ester high pressure reaction system.
Background technique
In the past few decades, asymmetry catalysis is always drug, is most chosen in agricultural chemicals and fragrance/perfume synthesis
War property and most interesting project.Heterogeneous catalysis plays an important role in many chemical processes, is easily isolated because it has
Intrinsic advantages.For the enantioselective hydrogenation of keto ester, most study is carried metal Pt catalyst to α -one at present
The chemo-selective and chiral selectivity of acid esters add hydrogen.
Ionic liquid has been used as the useful medium for the transition metal nanoparticles for preparing various sizes and shape.To current
Until, the stable metal nanoparticle of ionic liquid has been mainly used in the catalyst of alkene or aromatic hydrogenation.However, at present not
Develop the application that the nanoparticle in ionic liquid is used for enantioselective hydrogenation.In this patent, it is closed in ionic liquid
At the metal nanoparticle stable by cinchona alkaloid, collaboration of the gained metal nanoparticle in chiral modifier and solvent etc.
The lower catalysis keto ester chemo-selective of effect and chiral selectivity add hydrogen, by simple extraction or are centrifuged achievable catalyst and produce
The separation of object can be recycled after the catalyst of recycling is dry.
Summary of the invention
The present invention provides nano metal catalysis keto ester high pressure reaction system in a kind of ionic liquid, and catalyst separation is dry
It can be recycled after dry, activity and chemo-selective can preferably be kept.This synthetic method is novel, simple process,
Product yield and purity is high, catalyst is cheap and easy to get, does not influence environment, is suitable for industrialized production.
Used technical solution is: nano metal is catalyzed keto ester high pressure reaction system in a kind of ionic liquid, special
Sign is that it includes following content: the metal nanoparticle stable by cinchona alkaloid, gained are synthesized in ionic liquid
Metal nanoparticle is catalyzed keto ester chemo-selective and chiral selectivity under the synergistic effect of chiral modifier and solvent etc.
Add hydrogen, the separation of catalyst and product can be achieved by simple extraction or centrifugation, can be recycled after the catalyst of recycling is dry.
Nano metal is catalyzed keto ester high pressure reaction system in a kind of above-mentioned ionic liquid, it is characterized in that: catalyst system
In ionic liquid used include one of imidazolium ion liquid, pyridiniujm ionic liquid, quaternary ammonium salt ionic liquid Huo quaternary alkylphosphonium salt ionic liquid
Or it is several, stabilizer used in catalyst system includes quinine and its derivative, the type of nano metal include rhodium, ruthenium,
One of palladium, iridium, platinum are a variety of, and dressing agent includes quinine and its derivative or (1R,2R)-diphenyl ethylene diamine,
(1S,2S)-diphenyl ethylene diamine and its derivative or amino acid and its derivative.
Nano metal is catalyzed keto ester high pressure reaction system in a kind of above-mentioned ionic liquid, it is characterized in that: catalyst system
Middle solvent for use include imidazolium ion liquid, pyridiniujm ionic liquid, quaternary ammonium salt ionic liquid, quaternary alkylphosphonium salt ionic liquid and formic acid, acetic acid,
One of propionic acid, isopropyl acid, butyric acid, valeric acid, methanol, ethyl alcohol, propyl alcohol, isopropanol, water, tetrahydrofuran, toluene equal solvent or
It is several.
Nano metal is catalyzed keto ester high pressure reaction system in a kind of above-mentioned ionic liquid, it is characterized in that: keto ester packet
Include alpha-keto ester, beta-ketoester, γ -one acid esters etc..
Nano metal is catalyzed keto ester high pressure reaction system in a kind of above-mentioned ionic liquid, it is characterized in that: catalyst system
Employed in Hydrogen Vapor Pressure between 0.01-20MPa.
Specific embodiment
Below with reference to embodiment, invention is further described in detail.
The present invention through a large number of experiments, screening, optimization reaction condition preferably go out following synthetic route:
Embodiment 1 (reaction is referring to table 1, entry 10)
By PtO2(0.017mmol) and cinchonidine (0.034mmol) are well dispersed in [BMIM] PF6(1mL) (BMIM=1-
Butyl -2,3- methylimidazole) in, and reaction mixture is placed in stainless steel high-pressure reactor.Argon atmospher at room temperature
After lower stirring mixture 30 minutes, by the H of constant pressure2(g) (1MPa) is added in system, and system is stirred at 75 DEG C
It mixes 1 hour.Reactor is cooled to environment temperature and is carefully vented.Obtain dark solution.In stainless steel autoclave, to pre-
The Pt(0 first prepared) Cinchonidine modifier agent appropriate, cosolvent and substrate is added in catalyst, then simultaneously by autoclave sealing
Several times with pure hydrogen purging.It adjusts by reaction system to predetermined temperature, starts to react.It is completed in reaction and is cooled to environment
After temperature, by high speed centrifugation or liquid-liquid extraction separation product, and by gas chromatographic analysis, ethyl pyruvate is converted
100.0%, ee value 63.7%.It is recycled 6 times after catalyst separation, the 6th time ethyl pyruvate has converted 100.0%, ee value
70.0%。
Embodiment 2 (reaction is referring to table 1, entry 14)
By PtO2(0.017mmol) and cinchonidine (0.034mmol) are well dispersed in BMIMOTf(1mL) (BMIM=1- fourth
Base -2,3- methylimidazole) in, and reaction mixture is placed in stainless steel high-pressure reactor.At room temperature under argon atmospher
After stirring mixture 30 minutes, by the H of constant pressure2(g) (1MPa) is added in system, and system is stirred 1 at 75 DEG C
Hour.Reactor is cooled to environment temperature and is carefully vented.Obtain dark solution.In stainless steel autoclave, to preparatory
The Pt(0 of preparation) Cinchonidine modifier agent appropriate, cosolvent and substrate is added in catalyst, then autoclave is sealed and is used in combination
Pure hydrogen purges several times.It adjusts by reaction system to predetermined temperature, starts to react.It is completed in reaction and is cooled to environment temperature
After degree, by high speed centrifugation or liquid-liquid extraction separation product, and by gas chromatographic analysis, ethyl pyruvate is converted
100.0%, ee value 60.6%.Example in the optimization process of other conditions is shown in Table 1.
1. ethyl pyruvate enantioselective hydrogenation of table.[a]
[a] is reacted 30o2.5h, PH are carried out under C2: 5.0Mpa, substrate: 0.90mmol does not have during preparing Pt nanoparticle
There are cinchonidine stabilizer, substrate/Pt/ modifying agent=200:1:2, V ionic liquid: 1ml, V ionic liquid: V cosolvent=1:1.
Using gas chromatography, product is analyzed with flame ionization ditector and β-dex120 capillary column.[b] is by rotating
Light determines.[c] acetic acid: H2O=1:1, formic acid: H2O=1:1.
Embodiment 3 (reaction is referring to table 2, entry 1)
By PtO2(0.017mmol) and cinchonidine (0.034mmol) are well dispersed in [BMIM] PF6(1mL) (BMIM=1-
Butyl -2,3- methylimidazole) in, and reaction mixture is placed in stainless steel high-pressure reactor.Argon atmospher at room temperature
After lower stirring mixture 30 minutes, by the H of constant pressure2(g) (1MPa) is added in system, and system is stirred at 75 DEG C
It mixes 1 hour.Reactor is cooled to environment temperature and is carefully vented.Obtain dark solution.In stainless steel autoclave, to pre-
The Pt(0 first prepared) Cinchonidine modifier agent appropriate, cosolvent and substrate is added in catalyst, then simultaneously by autoclave sealing
Several times with pure hydrogen purging.It adjusts by reaction system to predetermined temperature, starts to react.It is completed in reaction and is cooled to environment
After temperature, by high speed centrifugation or liquid-liquid extraction separation product, and by gas chromatographic analysis, methyl pyruvate is converted
99.9%, ee value 69.0%.
The enantioselective hydrogenation of 2. nano platinum particle of table catalysis α -one.[a]
[a] reaction condition is identical as table 1, and (cinchonine is stabilizer and dressing agent, BMIMPF6It is mixed solvent with acetic acid), reaction
The substrate of time 1h, entry 1-2/pt/ dressing agent=4000:1:5, substrate/pt/ dressing agent=1000:1:5 of entry 3-4.[b]
TOF 3880 h-1, converted based on 0.5h.[c]TOF 1000 h-1, converted based on 0.5h.The TOF 405 that [d] is converted based on 1h
h-1.[e] is reacted 0o5h, substrate/pt/ dressing agent=400:1:5 are carried out under C.
Embodiment 4 (reaction is referring to table 2, entry 7)
By PtO2(0.017mmol) and cinchonidine (0.034mmol) are well dispersed in [BMIM] PF6(1mL) (BMIM=1-
Butyl -2,3- methylimidazole) in, and reaction mixture is placed in stainless steel high-pressure reactor.Argon atmospher at room temperature
After lower stirring mixture 30 minutes, by the H of constant pressure2(g) (1MPa) is added in system, and system is stirred at 75 DEG C
It mixes 1 hour.Reactor is cooled to environment temperature and is carefully vented.Obtain dark solution.In stainless steel autoclave, to pre-
The Pt(0 first prepared) Cinchonidine modifier agent appropriate, cosolvent and substrate is added in catalyst, then simultaneously by autoclave sealing
Several times with pure hydrogen purging.It adjusts by reaction system to predetermined temperature, starts to react.It is completed in reaction and is cooled to environment
After temperature, by high speed centrifugation or liquid-liquid extraction separation product, and by gas chromatographic analysis, methylbenzoyl formate turns
78.0%, ee value 78.3% is changed.
Embodiment 5 (reaction is referring to table 2, entry 8)
By PtO2(0.017mmol) and cinchonidine (0.034mmol) are well dispersed in [BMIM] PF6(1mL) (BMIM=1-
Butyl -2,3- methylimidazole) in, and reaction mixture is placed in stainless steel high-pressure reactor.Argon atmospher at room temperature
After lower stirring mixture 30 minutes, by the H of constant pressure2(g) (1MPa) is added in system, and system is stirred at 75 DEG C
It mixes 1 hour.Reactor is cooled to environment temperature and is carefully vented.Obtain dark solution.In stainless steel autoclave, to pre-
The Pt(0 first prepared) Cinchonidine modifier agent appropriate, cosolvent and substrate is added in catalyst, then simultaneously by autoclave sealing
Several times with pure hydrogen purging.It adjusts by reaction system to predetermined temperature, starts to react.It is completed in reaction and is cooled to environment
After temperature, by high speed centrifugation or liquid-liquid extraction separation product, and pass through gas chromatographic analysis, ethyl benzoylacetate conversion
69.3%, ee value 80.1%.Example in other substrate expansion process is shown in Table 2.
Embodiment 6 (reaction is referring to table 3, entry 7)
By RhCl3·3H 2O(0.014mmol) and cinchonidine (0.028mmol) is well dispersed in [BMIM] BF4(1mL)
In, and reaction mixture is placed in a stainless steel high-pressure reactor.It stirs mixture 30 minutes under an argon at room temperature
Afterwards, the H 2(g of constant pressure) (4MPa) is added in system, and content is stirred 1 hour at 60 DEG C.By reactor
It is cooled to environment temperature and is carefully vented.Obtain dark solution.In stainless steel autoclave, the Rh(0 that upward prepares) it urges
Cinchonidine modifier agent appropriate, substrate are added in agent, then autoclave is sealed and used pure by 1ml tetrahydrofuran cosolvent
Hydrogen purge is several times.It adjusts by reactant to predetermined temperature, starts to react.It is completed in reaction and is cooled to environment temperature
Afterwards, by high speed centrifugation or liquid-liquid extraction separation product, and by gas chromatographic analysis, ethyl pyruvate has converted 99.5%,
Ee value 45.5%.
Embodiment 7 (reaction is referring to table 3, entry 8)
By RhCl3·3H 2O(0.014mmol) and cinchonidine (0.028mmol) is well dispersed in BMIMPF6In (1mL), and
Reaction mixture is placed in a stainless steel high-pressure reactor.It, will after stirring mixture 30 minutes under an argon at room temperature
The H 2(g of constant pressure) (4MPa) is added in system, and content is stirred 1 hour at 60 DEG C.Reactor is cooled to
Environment temperature is simultaneously carefully vented.Obtain dark solution.In stainless steel autoclave, the Rh(0 that upward prepares) in catalyst
Cinchonidine modifier agent appropriate, substrate is added, then autoclave is sealed and blown with pure hydrogen by 1ml tetrahydrofuran cosolvent
It sweeps several times.It adjusts by reactant to predetermined temperature, starts to react.After reaction is completed and is cooled to environment temperature, pass through
High speed centrifugation or liquid-liquid extraction separation product, and by gas chromatographic analysis, ethyl pyruvate has converted 98.8%, ee value
30.0%.Example in the optimization process of other conditions is shown in Table 3.
3. ethyl pyruvate enantioselective hydrogenation of table.[a]
[a] is reacted 20o5h, PH are carried out under C2: 5.0MPa, substrate: 0.90mmol, cinchonine are stabilizer, and substrate/Rh/ is repaired
Adorn agent=200:1:5, v ionic liquid: 1ml, v ionic liquid: v cosolvent=1:1.Using gas chromatography, with hydrogen flame ion
Change detector and β-dex120 capillary column analyzes product.[b] is determined by rotation light.[c] is synthesized in Rh nano particle
In without addition stabilizer.
Embodiment 8 (reaction is referring to table 4, entry 7)
By RhCl3·3H 2O(0.014mmol) and cinchonidine (0.028mmol) is well dispersed in [BMIM] BF4(1mL)
In, and reaction mixture is placed in a stainless steel high-pressure reactor.It stirs mixture 30 minutes under an argon at room temperature
Afterwards, the H 2(g of constant pressure) (4MPa) is added in system, and content is stirred 1 hour at 60 DEG C.By reactor
It is cooled to environment temperature and is carefully vented.Obtain dark solution.In stainless steel autoclave, the Rh(0 that upward prepares) it urges
Cinchonidine modifier agent appropriate, substrate are added in agent, then autoclave is sealed and used pure by 1ml tetrahydrofuran cosolvent
Hydrogen purge is several times.It adjusts by reactant to predetermined temperature, starts to react.It is completed in reaction and is cooled to environment temperature
Afterwards, by high speed centrifugation or liquid-liquid extraction separation product, and by gas chromatographic analysis, methylbenzoyl formate is converted
50.8%, ee value 56.3%.
The alpha-keto ester enantioselective hydrogenation of the stable Rh nano particle catalysis of 4. cinchonidine of table.[a]
[a] reaction condition is identical as table 3 (V BMIMBF4:VTHF=1:1).
Embodiment 9 (reaction is referring to table 4, entry 8)
By RhCl3·3H 2O(0.014mmol) and cinchonidine (0.028mmol) is well dispersed in [BMIM] BF4(1mL)
In, and reaction mixture is placed in a stainless steel high-pressure reactor.It stirs mixture 30 minutes under an argon at room temperature
Afterwards, the H 2(g of constant pressure) (4MPa) is added in system, and content is stirred 1 hour at 60 DEG C.By reactor
It is cooled to environment temperature and is carefully vented.Obtain dark solution.In stainless steel autoclave, the Rh(0 that upward prepares) it urges
Cinchonidine modifier agent appropriate, substrate are added in agent, then autoclave is sealed and used pure by 1ml tetrahydrofuran cosolvent
Hydrogen purge is several times.It adjusts by reactant to predetermined temperature, starts to react.It is completed in reaction and is cooled to environment temperature
Afterwards, by high speed centrifugation or liquid-liquid extraction separation product, and by gas chromatographic analysis, ethyl benzoylacetate is converted
66.5%, ee value 60.9%.Example in other substrate expansion process is shown in Table 4.
Claims (5)
1. nano metal is catalyzed keto ester high pressure reaction system in a kind of ionic liquid, it is characterised in that, it includes following step
It is rapid: the metal nanoparticle stable by cinchona alkaloid to be synthesized in ionic liquid, gained metal nanoparticle is repaired in chirality
Be catalyzed keto ester chemo-selective under the synergistic effect of decorations agent and solvent etc. and chiral selectivity add hydrogen, by simple extraction or from
The heart can realize the separation of catalyst and product, can be recycled after the catalyst of recycling is dry.
2. nano metal is catalyzed keto ester high pressure reaction system, feature in a kind of ionic liquid according to claim 1
Be: ionic liquid used includes imidazolium ion liquid, pyridiniujm ionic liquid, quaternary ammonium salt ionic liquid or quaternary phosphine salt ion in catalyst system
One or more of liquid, stabilizer used in catalyst system include quinine and its derivative, the type of nano metal
Comprising one of rhodium, ruthenium, palladium, iridium, platinum or a variety of, dressing agent includes quinine and its derivative or (1R,2R)-diphenyl
Ethylenediamine, (1S,2S)-diphenyl ethylene diamine and its derivative or amino acid and its derivative.
3. nano metal is catalyzed keto ester high pressure reaction system, feature in a kind of ionic liquid according to claim 1
Be: solvent for use includes imidazolium ion liquid, pyridiniujm ionic liquid, quaternary ammonium salt ionic liquid, quaternary alkylphosphonium salt ionic liquid in catalyst system
And formic acid, acetic acid, propionic acid, isopropyl acid, butyric acid, valeric acid, methanol, ethyl alcohol, propyl alcohol, isopropanol, water, tetrahydrofuran, dioxane,
One or more of toluene equal solvent.
4. nano metal is catalyzed keto ester high pressure reaction system, feature in a kind of ionic liquid according to claim 1
Be: keto ester includes alpha-keto ester, beta-ketoester, γ -one acid esters etc..
5. nano metal is catalyzed keto ester high pressure reaction system, feature in a kind of ionic liquid according to claim 1
Be: Hydrogen Vapor Pressure employed in catalyst system is between 0.01-20MPa.
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Citations (5)
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| JPS55162743A (en) * | 1979-06-05 | 1980-12-18 | Agency Of Ind Science & Technol | Asymmetric hydrogenation of alpha-ketoester |
| CN1530171A (en) * | 2003-02-12 | 2004-09-22 | ˹���ػ�ѧ��Ʒ�ɷ�����˾ | Method for asymmetric hydrogenation of carboxylic ester |
| CN102010447A (en) * | 2010-11-12 | 2011-04-13 | 华东师范大学 | Preparation method and application of ruthenium and rhodium transition metal complex functional ionic liquid |
| CN102093218A (en) * | 2010-12-22 | 2011-06-15 | 华东师范大学 | Application of ordered mesoporous carbon material-loaded platinum catalyst in alpha-keto ester asymmetrical catalytic hydrogenation reaction |
| CN104761518A (en) * | 2014-12-01 | 2015-07-08 | 青岛科技大学 | Method for synthesizing D-pantolactone through asymmetric hydrogenation under ionic liquid condition |
-
2019
- 2019-03-02 CN CN201910158023.8A patent/CN109794297A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55162743A (en) * | 1979-06-05 | 1980-12-18 | Agency Of Ind Science & Technol | Asymmetric hydrogenation of alpha-ketoester |
| CN1530171A (en) * | 2003-02-12 | 2004-09-22 | ˹���ػ�ѧ��Ʒ�ɷ�����˾ | Method for asymmetric hydrogenation of carboxylic ester |
| US20040220165A1 (en) * | 2003-02-12 | 2004-11-04 | Thomas John Meurig | Process for asymmetrically hydrogenating keto carboxylic esters |
| CN102010447A (en) * | 2010-11-12 | 2011-04-13 | 华东师范大学 | Preparation method and application of ruthenium and rhodium transition metal complex functional ionic liquid |
| CN102093218A (en) * | 2010-12-22 | 2011-06-15 | 华东师范大学 | Application of ordered mesoporous carbon material-loaded platinum catalyst in alpha-keto ester asymmetrical catalytic hydrogenation reaction |
| CN104761518A (en) * | 2014-12-01 | 2015-07-08 | 青岛科技大学 | Method for synthesizing D-pantolactone through asymmetric hydrogenation under ionic liquid condition |
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| Title |
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| MATTHIAS JOSEF BEIER ET AL.: "Ionic Liquid-Supported Pt Nanoparticles as Catalysts for Enantioselective Hydrogenation", 《ACS CATALYSIS》 * |
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